Helium Atom Bohr Model Proton Neutron Electron Illustration Posted on April 9, 2019 Helium Atom Bohr Model Proton Neutron Electron IllustrationImage Info File Name : depositphotos_201674864_stock_photo_helium_atom_bohr_model_proton_1.jpg Dimensions : 610x445 Ratio : 11:8 File Size : File Type : image/jpeg